data source;
input y x;
datalines;
60 70
45 55
55 63
51 68
.  73
;

proc reg data=source;
model y=x;
output out=predict
p=y_pred
LCL=y_95LCL
UCL=y_95UCL ;

proc print data=predict(where=(y=.)) noobs;
run;

http://support.sas.com/forums/thread.jspa?threadID=5453&tstart=0

Predicted value and 95% CI for an individual prediction (PROC REG)

SAS