I have linked an image of my example below. My example 'glues' a player shadow underneath the player sprite at an image point called "Shadow".
Let's go through it step by step. First you want to start by creating an event that runs every tick (so basically the refresh rate of the screen the game is being played on). Then, under a new action, select the sprite that you want to be glued to something, then go to 'Set Position'. Once the dialog appears for the X and Y values, enter in:
For the X coordinate: SpriteToBeStuckTo.ImagePointX("ImagePointName")
For the Y coordinate: SpriteToBeStuckTo.ImagePointY("ImagePointName")
Hope this helps!