– Click the picture that you want to change the blurriness for.

– Under Picture Tools, on the Format tab, in the Adjust group, click Corrections.

If you do not see the Format or Picture Tools tabs, make sure that you have selected a picture. You may have to double-click the picture to select it and open the Format tab.

– Under Sharpen and Soften, click the thumbnail that you want.

You can move your mouse pointer over any of the thumbnails, and use Live Preview to see what your picture will look like before you click the one that you want.

– To fine tune the amount of fuzziness, click Picture Corrections Options, and then under Sharpen and Soften, move the Sharpen and Soften slider, or enter a number in the box next to the slider.

You can also add an artistic effect, other effects such as shadows, reflections, and glows, or adjust the color of your picture.

Via Microsoft