Intel 4790 (non-k) temps—should I worry?

Hi, everyone, noob question here. My CPU temp is 70°C when idle and up to the higher 80s when gaming. After reading some articles, I see that this is definitely above normal (which is around 30° idle and 50° when gaming). My question is if these temps are something I should actually worry about—especially if there's a chance they will shorten my CPU's useful life—or if this is a case of "lower would be better, but it's ok and it won't kill your processor."