• has a different mean IQ than the general population and/or
• has a different standard deviation for IQ and/or
• has a significantly skewed distribution from the normal curve

One and two, yes, but I haven't seen data that would indicate some population has a significant skew in its IQ distribution.

it seems to me that I observe too many intelligent black folks for the mean to be in the 80s.

Why don't you do the numbers? The purely-black IQ mean is about 85, I believe. A great deal of American blacks have some admixture of whte genes, so I think the IQ average for US blacks is in high 80s, maybe 90. There are about 42m of them. So lets' try three standard deviations above the mean, IQ > 130-135, more or less. That would be about 0.13% of the population, so about 56,700 individuals. You'd actually expect a bit more because many people with a lot of white genes (which would push their expected IQ up) identify as black.

How many do you observe? :-/

You can also look at IQ proxies, like SAT. Here are 2015 scores by race -- LW sucks at formatting tables, but basically scores of whites (average ~530) are consistently about 100 points above the scores of blacks (average ~430). Asians score the highest.