blujadajhdja,
I don't think I answered you question as thoroughly as I could.
For your benefit as well as our readers, there's nothing wrong with your temperatures with respect to the information you gave. However, when posting information, ambient temperature is always a critical variable, as is what monitoring software utility you're using and what utility you're using to test your load temperatures.
As detailed in my guide, (I do hope that you please give it a read), Standard Ambient is 22C, which is the temperature at which Intel's tests and certifies their processors, and is also the industry standard for maintain a proper computer environment.
At 22C ambient, your 4790K should idle in the high 20's, with everything at stock including BIOS settings, because the processor idles at less than 0.0800 volts and less than 2 watts.
Also at 22C ambient, your load temperatures should not exceed 80C, so mid 70's are fine.
The actual spec for your CPU temperature is 72C, so the corresponding Core temperature is 77C.
CPU temperature and Core temperature are not interchangeable terms; they're completely separate measurements from different types of sensors. Even Intel contradicts their own terms in the software utility "Intel Extreme Tuning Utility", so it's no wonder why everyone is so confused.
Again, please read the guide so you can understand what you're seeing on your 4790K.
Hope this helps,
CT