How does probability fit into the description of the atom?

he wave Mechanic Model of the atom is based on probability. This probability is based on math by many scientist and was used to have come up with the orbitals shapes. These orbitals are based on the 95% probability of finding an electron in this region. Heisenbergs Uncertainty principle summed up states you can either no the location of momentum of an electron but not both. If you measure it, you hit it you change it, so your measurement is off.