In your Layers Palette, right-click on the fx icon of your layer to bring up the menu. Select Create Layers and press OK when the confirmation box appears. This will turn each of your Layer styles into its own Layer.
Select the Layer labeled Drop Shadow. Press Ctrl + T to bring up the Free Transform again then right-click in the bounding-box and select Warp from the menu. Click and drag the lower-right corner down and to the right. This will stretch out your drop shadow and give your sticker the appearance of being lifted.
Next we’re going to soften the shadow a bit. With your Drop Shadow layer still selected, click on the Add Layer Mask button at the bottom of your Layers palette, or go Layer > Layer Mask > Reveal All.