Just to clarify, do you want records that have a timestamp/date field which is more than 7 days from the current system date, meaning over a week old?
If this is the case, then the following sort job will give you the desired output:
//SORT1 EXEC PGM=SORT
//SORTIN DD *
//SORTOUT DD SYSOUT=*
//SYSOUT DD SYSOUT=*
//SYSIN DD *
The following records will be included in the output: