domain2.vl

{
    "$schema": "https://vega.github.io/schema/vega-lite/v4.json",
    "data": {
        "values": [
            {
                "x": 1,
                "y": 95
            },
            {
                "x": 2,
                "y": 97
            },
            {
                "x": 3,
                "y": 100
            },
            {
                "x": 4,
                "y": 105
            }
        ]
    },
    "encoding": {
        "x": {
            "field": "x",
            "type": "quantitative"
        },
        "y": {
            "field": "y",
            "scale": {
                "domain": [
                    90,
                    100
                ],
                "zero": false
            },
            "type": "quantitative"
        }
    },
    "mark": {
        "point": true,
        "type": "line"
    }
}