I dunno, the average human female height is between generally 160 and 170 cm (roughly 5'3" to 5'6"), so assuming the average for female Hyur to be 5'6" seems... a little tall to me. At least that's that's not what I think of when I think average. But to me, heights for this are relative. Few people in the real world look at someone and go "Oh wow you're 6'4!" It's usually "Oh hey you're tall." But it's a game, maybe they want their females taller than average.
Lining those images up it seems the shortest male Hyur is the same as the tallest female; the shortest male elezen is taller than the tallest male hyur; miqo'te are just shorter than hyur females (e.g. tallest miqo'te is about the same as the tall hyur). I did this quickly based off the images posted and my alignment is probably a little off and this isn't empirical by any means, just trying to create a reference.
Lining those images up it seems the shortest male Hyur is the same as the tallest female; the shortest male elezen is taller than the tallest male hyur; miqo'te are just shorter than hyur females (e.g. tallest miqo'te is about the same as the tall hyur). I did this quickly based off the images posted and my alignment is probably a little off and this isn't empirical by any means, just trying to create a reference.