It seems you’re looking for the of a Microsoft Office update for Mac OS X Lion (10.7.5) — specifically version 14.7.5 (since “1075” likely refers to 10.7.5 and the Office for Mac 2011 update version).
Microsoft Office for Mac OS X Lion 10.7.5: A Guide to Compatibility and Installation
Modern iterations of the Office suite require much newer operating systems due to changes in Apple's core technologies (such as the shift to 64-bit-only apps and modern security frameworks). End of support for Office for Mac 2011
: Since Microsoft no longer sells this version, you typically have to find physical "boxed" copies or product keys through secondary retailers like Other Legacy Options Office 2008 for Mac
