I want to change the ToolGrip position?

So I want to change the position of the players toolgrip. Would I do this?

script.Parent.GripForward = CFrame.new(-0.281, -0.066, -0.958)

Also another question, I believe is similar to this, If I need to change the players RightArm's Cframe to a different position what would I do?

You could do that! But you must know, there are a lot of other position properties such as: GripForward, GripPos, GripRight, and GripUp.

However I would personally select the tool you want to change the grip for, then Play with all of the position properties until you get it to the position you want! Test frequently as you change the properties!