Nearly everything in SSRS is an expression, so you can use VBA code to conditionally set the property value.
To set the background colour, set the BackgroundColor
property of the table cell to be:
=IIF(Fields!Mark.Value < 80, "Yellow", "White")
To set the font to bold, set the Font
-FontWeight
property of the table cell to be:
=IIF(Fields!Mark.Value < 80, "Bold", "Normal")
To make the text red, set the Color
property of the table cell to be:
=IIF(Fields!Mark.Value < 80, "Red", "Black")