That doesn't seem to be true, the global expectancy is 73 and only a dozen of the wealthiest countries are mid 80s. I wouldn't be worried about dying at 70, but maybe I'm built of tougher stuff.
My original statement was that life expectancy in many countries is in the mid-80s. Which is, in fact, true.
If you want to split hairs about what constitutes “mid”, you can, but I doubt many people would agree with you that age 84 does not qualify as “mid-eighties”.