Iirc WAIS (and most IQ tests) will only compare to your age group, so your drop in IQ is not relative to the general population. Edit,and as the other person s

Iirc WAIS (and most IQ tests) will only compare to your age group, so your drop in IQ is not relative to the general population. Edit,and as the other person says, the reliability more than 2 standard deviations up is somewhat limited, so a person scoring within 4 points is reasonable.