It's 67C for tCase, tJunction is obviously higher.
CPU degrades with use due to, among other things, diffusion. The higher the temp the faster the degradation. Same with voltage.
Unless you disabled protections it will shut down/throttle down after reaching max allowed temp and straight shut down once it reaches temperature that could result in quick catastrophic failure.
I wouldn't run this CPU for daily use with more than 1.35V and max core (not case) temperature of 80C under stress test load (and less for regular use)