I was reading about the CLT and found something that I think people use interchangeably. On one hand I found that 68% of the means are 1 standard deviations from away and 95% are 2 std dev. On the other hand, if I take a look at the Z-table I found that 68% is approx 1 std dev whereas 95% is 1.96 std dev away.

Can someone clarify this please? Are these values of "std devs away" interchangeable? Or better yet, what am I confusing?