As the study points out, the "ideal" height depends on the height of the respondent, as makes sense.
"Women between 5’ and 5’7” think 5’11” is ideal, but women above that height prefer a man to be 6’1”. Conversely, 47% of men between 6’ and 6’3” say the ideal woman is between 5’8 and 5’11”, compared to just 26% of men who are between 5’8” and 5’11” and want a woman in the same range.
I'm 5'6" tall and I guess if I had to give an answer I'd say anything from maybe 5'9" to 6'1" is "ideal". I can't imagine picking someone on the basis of height, however, although I do think that other than black men, men who are too tall are not very coordinated or graceful in their movements, which is more important to me.
It's also interesting that both the male and the female "ideals" are taller than the average height. In England, for example, the average height for women seems to be 5'4", which is the same as it is here from what I recall.
That's an interesting fact about the pheromones. I always assumed that they would be strongest at the "pulse points", where we put perfume.