If I buy a bow at28" and I shoot 29" would I be able to shoot it???

Sure...you would be able to shoot it.  Depending on the bow, it may stack a bit once you pass 28"s.

It is a tall tines 58" 60#@28"

Ditto with what Terry said.  Call Tall Tines and ask him or ask the seller to scale the bow at 28 and 29".  Generally speaking, on a recurve 3# per inch over 28 is ok.  If the bow jumps, say from 60@28 to 65@28 then you could say the bow stacks - which is a disproportinate amount of weight per inch above 28.

Thank you

Yes you can, as a general rule 3# per inch so you will be pulling 63# or there abouts. Go letem fly.