You probably won't find a birth record because Virginia didn't start to record births until 1852.
If he married and died in Shenandoah County, you'll find marriage and will/probate records for Shenandoah County at the Library of Virginia, www.lva.virginia.gov/public/local/results_all.asp?CountyID=V...
Your local public library must request the microfilm via inter-library loan. Then you can look through it for the applicable records.
You should investigate the holdings of the Shenandoah County Historical Society, www.shenandoahcountyhistoricalsociety.org/resources.php
Another resource is the Shenandaoh County Library System, https://countylib.org/local-history.html
. Successful Searching!