This is wrong and confused in every possible way.

Look up the Flynn effect ... it refers to an actual change in performance.

That the scores on a given IQ test are occasionally renormalized so that the mean is 100 has no bearing on whether "IQ is a statistical distribution", whether intelligence or whatever the heck IQ measures can be measured absolutely, or on the validity and meaning of the previous statements by Epa095, sokoloff, and irdc and why they are or are not true.

If everyone suddenly gets twice as smart as before, all of their IQs will shoot up until the scoring of every IQ test is renormalized to a mean of 100.