N4Z001 is a "container" hot fix that contains "member" hot fixes which will update your SAS software components.
See "What is a container hot fix?" in the SAS Hot Fix FAQ for more information on container and member hot fixes.
A manifest listing the contents of each of the following "member" hot fixes is available:
L8X055 manifest for Base SAS 9.4_M8
M3Y003 manifest for SAS Threaded Kernel 9.4_M8
N3D002 manifest for SAS Cloud Data Storage support 9.4