My girlfriend is 3 inches shorter than me and I'm glad she's not shorter because that would make pretty much everything inconvenient. Personally I used to be most into girls who are similar height as I am, because it makes everything more convenient. You don't have to bend down to make out or even give a hug and stuff.
I'm A girl and it bothers me if the guy is shorter, but it's not a deal breaker... But I do find that shorter guys almost always have Napoleon complexes and are extremely bitter about their height - and that definitely IS a deal breaker.
Prefer her to be shorter or at most near my height, so anything between 5' and 6' is good, the vast majority of women fall in that range anyway. No absolutes though, if she's taller or shorter than that but attractive i won't say no.