How can you know which is the "current dollar value" of a dollar value from another decade?
There are quite a few websites which will do a point-to-point calculation for you, if all you want is the comparison of the CPI.  For example, https://www.measuringworth.com/uscompare/

Saying how much a dollar was "worth" at a past point, however, is not a very precise question unless it's made more specific.  The price of computers, for example, have fallen even as they have become more powerful -- and even as the price level has risen.  It's simply not accurate to say that a five-hundred-sixty-three dollar computer today (of which there are many choices) would have cost only $1 in 1774!

I recommend this essay for a lot more detail on the matter.