First, what grip?
W, just in front of opposite shoulder.
SW, close to, but can be at the front shoulder.
E, usually closer to middle of front shoulder
Conti, usually front collarbone.
Above with closed stances.
Openstanced, first two, well, in front of chest......
Just hold racket forehand grip, see where the rackethead gets level with hitting zone, and check with your location to your body.