BarChartWithTarget.json

// SPECS

{
  "data": {
    "name": "dataset"
  },
  "title":"Sales Variance by Product",
  "transform": [
    {
      //"calculate": "datum['Total Sales'] *.80","as": "target"
      "calculate": "17000000", "as": "target"
    }
  ],
  "encoding": {
    "y": {
      "field": "Product",
      "type": "nominal",
      "sort":"-x",
      "axis":{
        "title":null,
        "domain": false,
        "ticks": false
      }
    },
    "x": {
      "field": "Total Sales",
      "type": "quantitative",
      "axis":{
        "grid": false,
        "ticks": false,
        "labels": false,
        "domain": false,
        "title":null
      }
    }
  },
  "layer": [{
      "mark": "bar",
      "encoding": {
        "color":{
          "condition":{
            "test": "datum['Total Sales'] > datum['target']", "value":"#009DDC"
          },
          "value": "#D8D2e1"
        }
      }
  },{
    "mark":{
      "type": "text",
      "align":"left",
      "baseline":"middle",
      "dx":3
    },"encoding": {
      "text": {
        "field":"Total Sales","type": "quantitative", "format":".2s"
      }
    }
  },
  {
    "mark":"tick",
    "encoding": {
      "x":{
        "field":"target",
        "type": "quantitative"
      },
      "y":{
        "field":"Product",
        "type": "nominal"
      },
      "color":{"value": "red"}

    }
  }]
}

//CONFIG 
{
  "view": {
    "stroke": "transparent"
  },
  "tick": {
    "thickness":3
  }
}