I simply turned the shirt inside out and sewed a new straight stitch on the shoulder seam. Apparently, a new seam makes the sleeve a little smaller and the neckline a little higher. The whole process took less than 30 minutes.
I'm happy the fix was super easy since all I have is a needle and thread (still no sewing machine -- winter tires for the car a little more important). Now, I have a more appropriate shirt for work.
Don't forget to hop over to my blog at jenniferelliott14.com.