Right Breast Implant Sits Higher Than the Other

You should trust the advice of your surgeon as he is aware of the technical elements of your surgery.  Give it time and the implants will resume their final position. If there is still asymmetry, discuss your concerns again in 6 months. 

It is much to early to pronounce another operation required to establish symmetry of your breasts.  Slight asymmetry is the rule after breast surgery which usually changes over time.  This may take several months so be patient.