Someone with a high IQ explain this paper to me

No.12010297 ViewReplyOriginalReport
https://humanvarieties.org/2013/04/18/iq-regression-to-the-mean-the-genetic-prediction-vindicated/

Does this paper prove that a mixed race(black and white) child's IQ will regress to the mean? So that even a high IQ black parent mating with a high IQ white parent their offsprings IQ will regress to the 85 average IQ of the black parent?