Hard to say. Lack of height is certainly a disadvantage overall, but the degree to which it is a disadvantage varies from girl to girl. To some girls, lack of height is a complete turn-off and a deal-breaker. To others it's a turn-off, but not the the extent of the girls mentioned earlier. Finally, to others, it's not a big deal at all.
What about the taller ladies? Seen quite a few around and in truth they can be really sexy and fun. Would like to to date a taller lady. I'm about 6ft in height and I saw a lady who was 6ft 5, had to look up, but still worth it.