Hiya, I really wouldn't get hung up on the number on the scales, I go by clothes size, so for your height I think anythink under a 10 would be too much x
As you're quite short I would say a size 8 - 10 would be ideal. You'd probably be that at about 8st 7lbs/9st? Not sure as I don't know what your build is, but that is only a rough guide!
I did it for you and 130lb takes you just within a healthy weight range...but again, other factors come into it too. I'm 5' 4" and look ok just over that weight but I know some people may feel it's too low or too high for them.