The person height is not the issue it’s your leg lenght. I’m am 5 ft 2 in but very short legs. I the dealer did a specail seat post for me however when in that low of a position your legs are not streight out not down for pushing. That does not work. YOu are pushing yourself off the back of the bike and pulling on the handles.
I did love it. Flat city use but it was not safe for me and the peddle postion was very unconfortable. I road it 4 times and gave up. I have the 3 speed.