I am 6'4" and...well...I weigh more than I care to mention, but more than you. My problems have always been with my leg length. Space Mountain is a tight fit for my legs, I sit by myself and kind of side ways. I don't do Space Mountain because its rough on my knees as is Dinosaur. I have not ridden he Teacups so I can't say about those. Tower of Terror and any other ride that uses seat belts will be no problem, the seat belts can almost wrap around me twice. Overall, Disney is very friendly to us Pooh sized folks. Go and have fun with no worries.