Gemara:

Sukkah 

Halacha:

Beit HaKenesset,  Contemporary Issues,  Tefillah 

Machshava:

Tefillah 

References: Succah: 51A  

Description

According to the Rambam, Tur and Rama, the ONLY reason that the BIG shul in Egypt has the Bima in the middle was so that EVERYONE could HEAR. As such, if, for practical reasons, people can hear better from a different location in the shul, you WOULD be able to move the Bima (כסף משנה)