Scotland have been told they have a difference maker in their ranks this summer.Scotland striker Lawrence Shankland has been backed to be Steve Clarke’s game-changer who could fire the national team into the World Cup knockout stages for the first time in history.Set to begin their Group C campaign with a clash against Haiti this weekend, the Rangers striker heads into the tournament in electric form, having scored three goals in his last two games for Scotland, with goals in each of their pre-World Cup friendlies against Curacao and Bolivia. He also notched 20 goals for Hearts last season prior to his move to Ibrox last month.Restricted to just 22 minutes of action at the European Championships in Germany two summers ago, former Arsenal and England centre forward Ian Wright has implored head coach Clarke to make him Scotland’s first-choice striker at the World Cup this summer, and backed him to be a difference-maker that can take the national team further than they’ve ever been before.Lawrence Shankland has been backed to be Scotland’s difference maker at the World Cup this summer…