Welcome to the club of i7 4790k ... stock settings and I have 80°C on water cooling loop.
That's why I decided to delid it, but failed with razer method, so I will buy delidding tool, because I don't wanna risk it.
Not sure if you can solve that problem any other way.
Maybe you can sell that CPU, and buy new one. Or keep that i7 4790k on stock settings untill you can afford new one. I'm not buying any other CPU with TIM inside ever again. Only soldered ones, since those have the lowest possible temps.