I haven't checked your sums but, assuming you're right, it would be equally true that a worktop height of 92.6 cm is at least 2cm too high for about 15.7M people, woudn't it? So your (male-biased) 'half empty' is another (wo)man's 'half full'.And that translates to back pain for millions of people. ... Taking the 171cm mean, and with σ = 9.1 for the UK, a worktop height of 91.4cm is at least 2cm too low for over 19M people aged over 25 in the UK. ... A height of 92.6 is at least 2cm too low for about 15.7M people.
I don't really know what you think is a practical solution, except maybe in single-sex households (and even then, there would be problems, probably cost, associated with appliances etc.). We live in relatively 'enlightened' times, with males and females contibuting to work at many kitchen worktops. Given an average M/F difference in height of aboit 140 mm, hence (per your formula) about an 84 mm M/F difference in optimum worktop height, I really don't see what one can do other than compromise somewhere in the 'middle'!
Kind Regards, John