usernameisthis,
Welcome to Tom's!
Here's the normal operating range for Core temperature:
80C
Hot (100% Load)
75C
Warm
70C
Warm (Heavy Load)
60C
Norm
50C
Norm (Medium Load)
40C
Norm
30C
Cool (Idle)
Core temperatures in the mid 70's are safe.
At the top of each Forum you'll find "Stickies" which are informative Threads permanently available for everyone's reference.
Near the top of the CPU's and Overclocking Forums you'll find this Sticky:
Intel Temperature Guide -
http://www.tomshardware.com/forum/id-1800828/intel-temperature-guide.html
If you'd like to become better informed on this topic, then give it...