They say that the perfect weight for some between 5-8 and 5-9 should be around 130 to 135. So, you're doing great!
Only if you're a girl and yet u'r still skinny.
If you're a guy, then nope. I guy 5 foot 9 should weigh more like 140 to 145 and you'll still be skinny but healthier and hotter looking.