There are some IR extenders that could also do the trick. Logitech makes them and that may be the best solution. MonoPrice.com is a great place to get them. Another option would be to see if the TV has an app that would allow him to control the TV with his smartphone. He could also try mounting the soundbar above the TV.
Scott Wilkinson says that many Sound Bars have an IR Repeater that will pass through the IR signal to the TV.