Seeing that it's only a 4 core cpu, i'm going to assume your not doing heavy gaming with it, so yes, a 95W TDP cooler is sufficient for a i7-4790 (an 84W TDP cpu)... I just match TDPs when buying coolers, i have never had issues with temps in any build i've done.
You'll be fine if you get a cooler with the same TDP or higher as the cpu.
(I know I'm late to answer this but I wanted to add a REAL answer for others searching for help instead of the answering with a question crap the others did.)
EDIT: I just read up on TDPs to make sure i'm not talking out my ass. Here is a summary of what i just read... TDPs are an estimate by the manufacturer, it's best to get a cooler with a higher TDP than the cpu (matching TDPs is okay but higher is recommended).
Should probably go back out and read some more, as TDP figures haven't meant anything in over a decade. I'll save you the trouble.
For Intel specifically based on the OP topic at hand, the 4790k has a TDP of 88W, but that TDP is based on base clock only and doesn't account for turbo frequency. Under turbo this CPU can hit 150W.
In most recent generations, Intel has what's called power profiles. Base profile a 14900k can say 125W TDP but that is base clocks only, and without regard to board auto OCs that come setup out of the box. With PL1/2 and TVB3 this CPU can and will hit 253W under full load with Intel Limits set in place. Since the board manufacturers disable these by default, that figure will go as high as your cooler allows it meaning the 14900k can hit 400W if allowed. This is brand new out of the box without touching the bios. This is why you see every 12900k, 13900k, and 14900k review showing high power usage under full CPU load scenarios when in reality these are by Intel standards 253W chips.
AMD runs under the same guidelines and the recent 7950X and 9950X chips can and will hit 250-300W without limits applied manually. The exception being the x3d chips as AMD has those voltage and frequency hard locked in microcode to not explode or burn out the 3D V-Cache.
Now the OP specified an i7 4790 insinuating a non K variant, but the same principles apply as its base frequency is lower at 3.6GHz to maintain a lower base TDP of 84W. Since it has a turbo boost of 4GHz that figure will easily be 100W or more.
I will continue that thought with coolers, specifically air coolers. The ones with a wattage/TDP dissipation rating are give or take and depend highly on a constant ambient delta without regards to heat soak. They do not take into consideration the 100/200/300W+ dissipation of whatever your GPU is putting out into the hotbox of a case. Without an open air test bench, or constant ambient temp in the case this curve is a linear slope upwards until the heatsink is heat soaked and the CPU turbo boost throttles due to thermal constraints. These figures almost always rely on base limits applied as well in testing. A 255W rated Noctua heatsink will almost always fill up the empty space in your case restricting airflow and sit directly on top of your GPU soaking it with unwanted heat reducing that wattage rating significantly. So you can't always rely on TDP ratings, and it's ALWAYS better to over compensate on cooling capacity within reason. Like PSUs, there's never too much until you hit subzero cooling.
