How to fix position of an image in a Word document?

To fix a picture in a line in the document

Select and drag the picture to the line in the document.
On the ribbon menu, click the Format tab under Picture Tools.
Under Format tab, within the group Arrange, click Wrap Text.
Select option In Line with Text from the drop-down list.

Shortcut key method to insert a picture

Select and drag the picture to the line in the document.
While keeping the picture selected, press the ALT key and then press the keys J P T W I one after another.