The Ruling of Putting Copies of the Qur'an behind the Worshippers
Question :
In some Mosques, copies of the Qur'an are placed on shelves in between rows, so that some people have to turn their backs to the Qur'an; what is the ruling regarding this?
Answer:
We do not know of any harm in that when it is necessary.
Source:
Ibn Baz
Fatawa Islamiyah, Vol. 7 Page 81