Place the red-lined cursor at the cut point, right-click the clip in the bin and PLACE ON SEQUENCE AT CURSOR. The clip will insert at that point, moving later clips to the right.
If instead you prefer to drag the later clip, leaving a gap for the new one, first select (highlight) all the trailing clips, then hold down <alt> while dragging. They will all move right, leaving a gap.
Yet another method is to drag the clip from the bin to the cut point. Watch for arrows on the sequence track. When they line up with the cut point, let go of the mouse button.