As was referenced in other comments, it seems like the graphic won't be getting updated until the end of the graphic move. I've forked your original JSFiddle (below) with the mentioned approach of enabling the Map's 'mouse-move' event once the 'graphic-move-start' event is fired (then disabling it when the 'graphic-move-end' event is fired): "graphic-move" handler not working - JSFiddle This should hopefully get you the coordinates as the mouse is dragging the point.
... View more