The INSERT statement inserts data values into PROCLIB.PAYLIST according to the position in the VALUES clause. Therefore, in the first VALUES clause, 1639 is inserted into the first column, F into the second column, and so forth. Dates in SAS are stored as integers with 0 equal to January 1, 1960. Suffixing the date with a d is one way to use the internal value for dates. 
insert into proclib.paylist
    values('1639','F','TA1',42260,'26JUN70'd,'28JAN91'd)
    values('1065','M','ME3',38090,'26JAN54'd,'07JAN92'd)
    values('1400','M','ME1',29769.'05NOV67'd,'16OCT90'd)