Edit: I remember there was an AMA on reddit which was just with some guy who had a lower than average IQ and everyone acted like they were meeting an alien.

Taking the IQ score for a characteristic that says something precise about an individual, like height or weight, is a fallacy. The real utility of IQ is statistical. It correlates highly with a number of relevant measures of ability and success in life, but the connection is ultimately probabilistic. Someone who scored 85 on an IQ test is highly likely to perform worse on pretty much any intellectual task than someone who scored, say, 115. However, in a large population, there will be a significant number of exceptions -- both above-average IQ types who are otherwise dumb as a box of rocks and useless for any productive work, and below-average folks who come off as clever and competent.

This is by no means to say that IQ is irrelevant. In a population large enough for the law of large numbers to kick in, the relevant measures of intellectual success and competence will correlate with the IQ distributions with merciless regularity. But whatever it is exactly that IQ tests measure, it contains enough randomness and irrelevant components to make the correlations imperfect and allow for lots of individual exceptions.