I think you are getting confused by the measure unit. The right expression of a moment (mathematic) is
thishttps://en.m.wikipedia.org/wiki/Moment_(mathematics).
You can apply this definition because you have already applied the continuous geometrical model (little mass dots forming your body) . If you thereat your body as a statistical distribution of point you can definitely apply the maths on the link (
Your model could also be a perfect distribution).
Finally you can calculate every moment quantity you want, mass, distant (static moment), area (inertia moment), volume(solid moment)... They tell you info about distribution, so about your body.
