PointF is changing from screen to screen in c#, How Can I rectify it ?

private void rotateString(Graphics g)
        {
            g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias;

            g.RotateTransform(-15);  //rotate in a given angle
            g.DrawString(textCName.Text, new Font("Arial", 12), Brushes.Black, new PointF(60, 600));
            g.DrawString(textSignature.Text, new Font("Edwardian Script ITC", 12), Brushes.Black, new PointF(500, 700));
        }