I have 64 bit SAS 9.4 installed and 32 bit Office 2007. When I had 32 bit SAS 9.3 installed, I was able to use a libname statement where the Excel file was the library and
The problem is you need the 64 bit Excel libraries for 64 bit SAS to interact with.
Chris Hemedinger posted a few work arounds to this issue as few years ago. http://blogs.sas.com/content/sasdummy/2012/05/01/64-bit-gotchas/
If you have ACCESS/ODBC, another option is to create an ODBC connection to the Excel spreadsheet.