Looks like a bug. You can work around it like this:
Use the TextFont command to specify the font name and rotation.
@Audrey_Shull - the bottom graph is the saved SVG, opened in an external viewer, Firefox in this case.
 
gb = Graph Builder(
	Show Control Panel( 0 ),
	Variables( X( :height ), Y( :weight ), Overlay( :sex ) ),
	Elements(
		Points( X, Y, Legend( 1 ) ),
		Smoother( X, Y, Legend( 2 ) )
	),
	SendToReport(
		Dispatch( {}, "height", ScaleBox,
			{Label Row( Label Orientation( "Perpendicular" ) )}
		),
		Dispatch( {}, "weight", ScaleBox,
			{Label Row( Label Orientation( "Angled" ) )}
		)
	)
);
Report( gb )[framebox( 1 )] <<
addgraphicsscript( Text( counterclockwise, {60, 60}, "Hello" ) );
Report( gb )[framebox( 1 )] <<
addgraphicsscript(
	{fname, fsize, fstyle, fangle} = Text Font();
	Text Font( fname, fsize, fstyle, -90 );
	Text( {65, 60}, "Hello" );
);
					
				
			
			
				
	Craige